Abstract The surface plasmonic resonance (SPR) effect of Bi can effectively improve the light absorption abilities and photogenerated charge carrier separation rate. In this study, a novel ternary heterojunction of g-C3N4/Bi2MoO6/Bi (CN/BMO/Bi) hollow microsphere was successfully fabricated through solvothermal and in situ reduction methods. The results revealed that the optimal ternary 0.4CN/BMO/9Bi photocatalyst exhibited the highest photocatalytic efficiency toward rhodamine B (RhB) degradation with nine times that of pure BMO. The DRS and valence band of the X-ray photoelectron spectroscopy spectrum demonstrate that the band structure of 0.4CN/BMO/9Bi is a z-scheme structure. Quenching experiments also provided solid evidence that the •O2− (at −0.33 eV) is the main species during dye degradation, and the conduction band of g-C3N4 is only the reaction site, demonstrating that the transfer of photogenerated charge carriers of g-C3N4/Bi2MoO6/Bi is through an indirect z-scheme structure. Thus, the enhanced photocatalytic performance was mainly ascribed to the synergetic effect of heterojunction structures between g-C3N4 and Bi2MoO6 and the SPR effect of Bi doping, resulting in better optical absorption ability and a lower combination rate of photogenerated charge carriers. The findings in this work provide insight into the synergism of heterostructures and the SPR absorption ability in wastewater treatment.

中文翻译：

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新型间接 Z 型 g-C3N4/Bi2MoO6/Bi 空心微球异质结具有 SPR 促进的可见光吸收和高度增强的光催化性能

摘要 Bi的表面等离子体共振（SPR）效应可以有效提高光吸收能力和光生载流子分离率。在这项研究中，通过溶剂热和原位还原方法成功制备了一种新型 g-C3N4/Bi2MoO6/Bi（CN/BMO/Bi）空心微球三元异质结。结果表明，最优的三元 0.4CN/BMO/9Bi 光催化剂对罗丹明 B (RhB) 的降解表现出最高的光催化效率，是纯 BMO 的 9 倍。X射线光电子能谱的DRS和价带表明0.4CN/BMO/9Bi的能带结构是z-scheme结构。淬火实验还提供了确凿的证据，表明 •O2−（在 -0.33 eV 处）是染料降解过程中的主要物质，g-C3N4 的导带只是反应位点，表明 g-C3N4/Bi2MoO6/Bi 的光生载流子的转移是通过间接 z-scheme 结构进行的。因此，增强的光催化性能主要归因于 g-C3N4 和 Bi2MoO6 之间异质结结构的协同效应和 Bi 掺杂的 SPR 效应，导致更好的光吸收能力和更低的光生载流子结合率。这项工作的发现提供了对异质结构的协同作用和污水处理中 SPR 吸收能力的见解。增强的光催化性能主要归因于 g-C3N4 和 Bi2MoO6 之间异质结结构的协同效应和 Bi 掺杂的 SPR 效应，导致更好的光吸收能力和更低的光生载流子结合率。这项工作的发现提供了对异质结构的协同作用和污水处理中 SPR 吸收能力的见解。增强的光催化性能主要归因于 g-C3N4 和 Bi2MoO6 之间异质结结构的协同效应和 Bi 掺杂的 SPR 效应，导致更好的光吸收能力和更低的光生载流子结合率。这项工作的发现提供了对异质结构的协同作用和污水处理中 SPR 吸收能力的见解。